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# Parabolicity, Volterra Calculus, and Conical Singularities: A Volume of Advances in Partial…

## bySergio AlbeverioEditorMichael Demuth, Elmar Schrohe

### Paperback | October 13, 2012

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Partial differential equations constitute an integral part of mathematics. They lie at the interface of areas as diverse as differential geometry, functional analysis, or the theory of Lie groups and have numerous applications in the applied sciences. A wealth of methods has been devised for their analysis. Over the past decades, operator algebras in connection with ideas and structures from geometry, topology, and theoretical physics have contributed a large variety of particularly useful tools. One typical example is the analysis on singular configurations, where elliptic equations have been studied successfully within the framework of operator algebras with symbolic structures adapted to the geometry of the underlying space. More recently, these techniques have proven to be useful also for studying parabolic and hyperbolic equations. Moreover, it turned out that many seemingly smooth, noncompact situations can be handled with the ideas from singular analysis. The three papers at the beginning of this volume highlight this aspect. They deal with parabolic equations, a topic relevant for many applications. The first article prepares the ground by presenting a calculus for pseudo differential operators with an anisotropic analytic parameter. In the subsequent paper, an algebra of Mellin operators on the infinite space-time cylinder is constructed. It is shown how timelike infinity can be treated as a conical singularity.

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Title:Parabolicity, Volterra Calculus, and Conical Singularities: A Volume of Advances in Partial…Format:PaperbackDimensions:359 pagesPublished:October 13, 2012Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3034894694

ISBN - 13:9783034894692

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Table of Contents

Volterra Families of Pseudodifferential Operators.- 1. Basic notation and general conventions.- 1.1. Sets of real and complex numbers.- 1.2. Multi-index notation.- 1.3. Functional analysis and basic function spaces.- 1.4. Tempered distributions and the Fourier transform.- 2. General parameter-dependent symbols.- 2.1. Asymptotic expansion.- 2.2. Homogeneity and classical symbols.- 3. Parameter-dependent Volterra symbols.- 3.1. Kernel cut-off and asymptotic expansion.- 3.2. The translation operator in Volterra symbols.- 4. The calculus of pseudodifferential operators.- 4.1. Elements of the calculus.- 4.2. The formal adjoint operator.- 4.3. Sobolev spaces and continuity.- 4.4. Coordinate invariance.- 5. Ellipticity and parabolicity.- 5.1. Ellipticity in the general calculus.- 5.2. Parabolicity in the Volterra calculus.- References.- The Calculus of Volterra Mellin Pseudodifferential Operators with Operator-valued Symbols.- 1. Preliminaries on function spaces and the Mellin transform.- 1.1. A Paley-Wiener type theorem.- 1.2. The Mellin transform in distributions.- 2. The calculus of Volterra symbols.- 2.1. General anisotropic and Volterra symbols.- 2.1.1. Hilbert spaces with group-actions.- 2.1.2. Definition of the symbol spaces.- 2.1.3. Asymptotic expansion.- 2.1.4. The translation operator in Volterra symbols.- 2.2. Holomorphic Volterra symbols.- 3. The calculus of Volterra Mellin operators.- 3.1. General Volterra Mellin operators.- 3.2. Continuity in Mellin Sobolev spaces.- 3.3. Volterra Mellin operators with analytic symbols.- 4. Kernel cut-off and Mellin quantization.- 4.1. The Mellin kernel cut-off operator.- 4.2. Degenerate symbols and Mellin quantization.- 5. Parabolicity and Volterra parametrices.- 5.1. Ellipticity and parabolicity on symbolic level.- 5.2. The parametrix construction.- References.- On the Inverse of Parabolic Systems of Partial Differential Equations of General Form in an Infinite Space-Time Cylinder.- 1. Preliminary material.- 1.1. Basic notation and general conventions.- Functional analysis and basic function spaces.- Preliminaries on function spaces and the Mellin transform.- Global analysis.- 1.2. Finitely meromorphic Fredholm families in ?-algebras.- 1.3. Volterra integral operators.- Some notes on abstract kernels.- 2. Abstract Volterra pseudodifferential calculus.- 2.1. Anisotropic parameter-dependent symbols.- Asymptotic expansion.- Classical symbols.- 2.2. Anisotropic parameter-dependent operators.- Elements of the calculus.- Ellipticity and parametrices.- Sobolev spaces and continuity.- Coordinate invariance.- 2.3. Parameter-dependent Volterra symbols.- Kernel cut-off and asymptotic expansion of Volterra symbols.- The translation operator in Volterra symbols.- 2.4. Parameter-dependent Volterra operators.- Elements of the calculus.- Continuity and coordinate invariance.- Parabolicity for Volterra pseudodifferential operators.- 2.5. Volterra Mellin calculus.- Continuity in Mellin Sobolev spaces.- 2.6. Analytic Volterra Mellin calculus.- Elements of the calculus.- The Mellin kernel cut-off operator and asymptotic expansion.- Degenerate symbols and Mellin quantization.- 2.7. Volterra Fourier operators with global weight conditions.- 3. Parameter-dependent Volterra calculus on a closed manifold.- 3.1. Anisotropic parameter-dependent operators.- Ellipticity and parametrices.- 3.2. Parameter-dependent Volterra operators.- Kernel cut-off behaviour and asymptotic expansion.- The translation operator in Volterra pseudodifferential operators.- Parabolicity for Volterra operators on manifolds.- 4. Weighted Sobolev spaces.- 4.1. Anisotropic Sobolev spaces on the infinite cylinder.- 4.2. Anisotropic Mellin Sobolev spaces.- Mellin Sobolev spaces with asymptotics.- 4.3. Cone Sobolev spaces.- 5. Calculi built upon parameter-dependent operators.- 5.1. Anisotropic meromorphic Mellin symbols.- 5.2. Meromorphic Volterra Mellin symbols.- Mellin quantization.- 5.3. Elements of the Mellin calculus.- Ellipticity and Parabolicity.- 5.4. Elements of the Fourier calculus with global weights.- Ellipticity and Parabolicity.- 6. Volterra cone calculus.- 6.1. Green operators.- 6.2. The algebra of conormal operators.- Operators that generate asymptotics.- Calculus of conormal symbols.- The operator calculus.- Smoothing Mellin and Green operators.- 6.3. The algebra of Volterra cone operators.- The symbolic structure.- Compositions and adjoints.- 6.4. Ellipticity and Parabolicity.- Parabolic reductions of orders.- 7. Remarks on the classical theory of parabolic PDE.- References.- On the Factorization of Meromorphic Mellin Symbols.- 1. Introduction.- 2. Preliminaries.- 2.1. Parameter-dependent operators.- 2.2. Meromorphic Mellin symbols.- 2.3. Reduction to holomorphic Mellin symbols.- 3. Logarithms of pseudodifferential operators.- 3.1. The classes L? log (X; ?).- 3.2. The exponential map.- 3.3. The topological invariant ?(A).- 3.4. Characterization of the image of exp.- 4. The kernel cut-off technique.- 5. Proof of the main theorem.- 5.1. Beginning of the proof.- 5.2. Continuation of the proof.- 5.3. The remaining case for dim X = 1.- References.- Coordinate Invariance of the Cone Algebra with Asymptotics.- 1. Cone operators on the half-axis.- 1.1. The cone algebra.- 1.2. Spaces with asymptotics and Green operators.- 1.3. Push-forward of Mellin operators.- 1.4. Invariance of the cone algebra.- Appendix to Sect. 1.4: An intrinsic interpretation of the principal symbol.- 1.5. Symbolic rules.- 2. Operators on higher-dimensional cones.- 2.1. The cone algebra.- 2.2. Spaces with asymptotics and Green operators.- 2.3. Push-forward of Mellin operators.- 2.4. Invariance of the cone algebra.- References.